Rotating jar



Mar. 27, 1923 C. R. EDWARDS ROTAT-ING JAR 8 "canto z Filed Mar. 15, 1922 by means of which the device is suspended in the bore. The upper end of this cable is, attached to a suitable working beam at the Patented Mar. 27, 1923-.

CHARLES R. EDWARDS, OF HOUSTON, TEXAS.

ROTATING JAR.

Application filed March 13, 1922. Serial No. 548,252.

T 0 all whom it may concern:

Be it known that 1, CHARLES B. EDwA'RDs, citizen of the United States, residing at Houston, in the county of Harris and State. of Texas, have invented certain new and useful Improvements in a Rotating Jar, of which the following is a specification.

This invention relatesto new and useful im rovements in a rotating jar.

ne object of the invention is to providea device of the character described which has been designed for use in well drilling with cable tools, and more particularly for the purpose of unscrewing and withdrawing pipe or other parts of the drilling apparatus which may become stuck in the well bore. In the process of drilling wells the pipe or drilling tools sometimes become stuck in the well bore and cannot be pulled out and it becomes necessary to unscrew the joints of pipe, or other parts of the drilling appliances so. struck and withdraw them a joint, or part, at atime. It is the object of this invention to provide a'rotating jarv which may be connected to the parts to be withdrawn, and by means of which they may be unscrewed and separated and thus removed from the bore. I

Another'object of the invention is to provide a rotating jar which may be released and withdrawn from the bore, in case the pipe or other drilling apparatus in the bore is so tightly stuck that it cannot be recovered. w

A still further feature of the invention resides in the provision of a rotating jar whichis of simple construction and may be cheaply and easily manufactured and which may be effectively operated b the appliances at hand in cable tool dri ling.

With the above and other objects in view the invention has particular relation to certain novel features of construction, opera tion and arrangement of parts, an example of which is given in this specification and illustrated in the accompanying drawings, wherein I v Figure 1 is a vertical sectional view of I the complete device and,

- Figure 2 is an enlarged vertical sectional view ofthe lower part thereof.

Referrin nowv more particularly to the drawings, t e numeral 1 designates the cable ground surface, this working beam has not been shown for the reason that it is in commen use and its construction is well known pending spindle 3 which carries the swivel 4. This swivel. is threaded into the upper end of a tubular weight 5 in which 5 there threaded or otherwise secured the cylindrical hammer 6 which is considerably shorter than the weight 5 and located approximately midway between the ends thereof. The numeral 7 designates the part which is stuck in the bore and which is sought to be withdrawn. The hammer 6 has a vertical central passageway 8. whose respective ends are blank and intermediate said blank ends the opening is provided with coarse threads which are preferably mutilated. Threaded through the opening 8 there is a rod 9 which has a coarse external thread of considerable pitch and which intermeshes with the threads of the hammer. T'he upper end of the rod 9 has a head 10 fixed thereto and the-lower end joints of the pipe to be" removed are connected by right hand threads. The threads of the grappling member 12 will according be left handed. In. operation the device is let down into the bore and the die of'the grapling member will engage over the upper end .of the pipe to be pulled. The weight '5 is then alternately elevated and suddenly dropped. During this operation the rod 9 will remain stationary the weight of it and its appendants being suflicient to hold it in a stationary position. When the weight is dropped it is obvious that it will whirl, in a left handed, or anticlockwise direction and when the hammer strikes the upper end ofthe socket member its rotation will be imparted to said socket member causing a partial rotation thereof in a left 'hand direction and the die will gradually cut threads on the upper end of the pipe to be removed until it securely engages therewith and as succeed ing strokes of the hammer are delivered to said socket member, the upper 'oint of pipe to be removed will be gradual unscrewed from the joints beneath it and can be lifted out and removed.

' In case the jointsof pipe are so securely stuck together that they can not be unscrewed itwill become necessary to release the tool from the stuck pipe so that it can be withdrawn from the bore. In order to release, or back ofl" the tool from the-pipe 7, the operation is reversed, that is the weight is pulled upward suddenly, in successive strokes and as it moves upwardly on the rod 5 it will rapidly rotate toward the right and the hammer 6 will strike the head 10 with successive strokes; Each stroke will impart a partial rotation toward the right to the head 10 and, through the rod 9, to the tool 12 gradually unscrewing the grappling "tool 12 from the pipe 50 that the device ma be withdrawn from the bore. t is to be noted that the upper end of the socket member 11 is formed with oppositely disposed shoulders 13, 13. and the lower end of the hammer is formed with corresponding shoulders as 14 which abut against the shoulders'13 when the hammer is drop-pedthus increasing the friction and insuring the rotation of the socket member 11 through the strokes delivered to it by the hammer, and

, likewise the lower end of the head 10 has shoulders 15 against which the shoulders 16 carried by the upper end of the hammer contact to insure the rotation of said head and the rod- 9 from the successive hammer strokes.

What I .claim is 1. A device of the character described includingan engaging member, a rotary hammer and means connected to said member against which the hammer strikes to impart successive partial rotations thereto with successive strokes.

2. A device of the character decribed including a member adapted to engage with pipe and the like, arotary hammer, and means connected to said member against which said hammer is adapted to striketo rotate said member.

3. A device of the character described including a member adapted to engage withpipe and the like, a hammer vertically movable relative to said'member, means for reciprocatlng said hammer up and down, means for rotating the hammer as it moves cluding a pipe engaging member, a reciprocating hammer, means for rotating the hammer as it reciprocates, abutments con nected 'to the member one on each side of the hammer, against either of which the hammer is adapted to strike.

5. A device of the character described in cluding a tool 'formed to engage with pipe and the like, a reciprocating hammer, means for rotating the hammer as it reciprocates, abutments connected to the tool one on each side of the hammer against one of which the hammer is adapted to 'strike to rotate the tool in one direction and against the other of which the hammer is adapted to strike to rotate the tool in the other direction.

6. A device of the character described including a rotary-tool, a coarsely threaded rod upstanding from said tool, a hammer re? ciprocable on said rod to which rotationis imparted by the threads thereof as it reciprocates, and an abutment carried by said rod on each side of said hammer.

7. The combination with a rotatable tool of a threaded ,part connected thereto, a member reciprocable relative to said threaded part andrto which rotation is imparted by the reciprocating member is adapted to strike.

9.-The combination with a rotatable tool of a threaded part connected thereto, a member reciprocable relative to said threaded part and .to which rotation is imparted by ,said threads as it reciprocates, and abutments connected to said threaded part on opposite sides of the hammer.

In testimonywhereof I have signed my name to this specification in the presence of two subscribing witnesses.

CHARLES R. EDWARDS.

Witnesses:

W. H. DUNLAY, E. V. HARDWAY. 

